Exposure to secondhand smoke has been linked to numerous life-threatening diseases such as heart attack, stroke, and cancer. Eliminating smoking in indoor spaces reduces exposure to secondhand smoke, thereby reducing the occurrence of these chronic illnesses. Research in communities that have implemented indoor smoking bans shows significant improvement to public health after the ban goes into effect. For example, hospital admissions for heart attacks dropped 40 percent in the six months following an indoor smoking ban in Helena, Montana; and, in Pueblo, Colorado, heart attacks declined 30 percent in 18 months after smoking was banned indoors.